Senbowe&trade; Bluetooth 4.1 Wireless Sports Headphones In-ear apt-X Stereo Earbuds Headsets with Microphone for IOS and Android Devices Magnetic Control Design: can attract each other to a circle hanging your neck without use,very convenien. Newest Bluetooth 4.1 Technology: Easy and fast pairing with smartphones, tablets and other Bluetooth enabled devices;support apt-X codec. CVC 6.0 Technology: Noise Cancellation 6.0 reduces outside noises and enables clearer sound from microphone. You can get high quality, hands-free phone sound even you are in a noisy environment. Up to 5 hours of continuous talking / music time and up to 110 hours of standby with a single charge Only need to pair once and easy to pair,beeps when it is running low.